Trial Purpose:
1st contaminant cleaning
Date Run:
04/03/2002Experiment Procedure:
Eighteen preweighed coupons were coated with Bencyn B-5186 (64742-52-5, 9003-29-6, 39464-69-2, 63197-48-8) a heavy metal working fluid using a hand held swab. Coupons were reweighed. Nine coupons were clipped to wire racks and immersed into the Flow-Matic machine and cleaned for 1 minutes using ultrasonics at 92 F, removed and rinsed in a tap water spray and re-immersed into the ultrasonics for an additional 1 minute followed by a second 5 second rinse. The nine coupons were then dried using an air knife for 15 seconds and then using a Master Appliance heat gun at 500 F for 15 seconds. The second set of nine coupons followed the same cleaning cycle except they were hung on a wire stand and immersed into a Crest 40 kHz ultrasonic tank.
Trial Results:
Comparison of the two processes revealed that the Flow-Matic system was more effective than the traditional ultrasonic equipment. The following table lists the results obtained during the evaluation.
Table 1. Cleaning Efficiencies
| Process | Flow-Matic | Traditional |
| 96.6 | 56.9 | |
| 95.0 | 70.0 | |
| 70.1 | 57.4 | |
| 93.1 | 51.7 | |
| 76.9 | 77.8 | |
| 68.0 | 74.1 | |
| 95.8 | 67.6 | |
| 95.2 | 77.8 | |
| 80.2 | 67.5 | |
| Average | 85.7 | 66.8 |
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
For the heavy metal working fluid, the Flow-Matic system was more effective than the traditional ultrasonic method.
